Improvement in injectors



UNITED STATES PATENT OEEIGE.

WILLIAM RANDALL, on SALEM, MASSACHUSETTS.

IMPROVEMENT IN lINJE'c'oRs'.

Specification forming part of Letters Patent No. 119,414, dated April 7.1874 application filed February 28, 167,4.

To all whom it may concern:

Beit known that I, WILLIAM RANDALL, of Salem, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Injectors for Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specication.

My invention relates to improvements in injectors for steam-boilers; and consists in the employment of a conical nozzle, provided near its delivery end with a T-pipe, in combination and communicating with an annular space surrounding the said conical nozzle, by which arrangement the steam and water may be let into the injector from either of two inlets, one of which is in the rear of the aforesaid nozzle, and the other one leads into the annular space surrounding; it, as will herein be more fully described. My invention also consists in an additional water-inlet leading` into an annular space surrounding a conical projection, and provided with an overflow-pipe, by which arrangement I am enabled to feed with warm water, which object has heretofore been very difficult to accomplish.

On the drawings, Figure l represents a ground plan of my invention. Fig. 2 represents a central longitudinal section. Fig. 3 represents a cross-section on the line A B, shown in Fig. 2; and Fig. 4 represents a similar cross-section on the line C I), shown also in Fig. 2.

Similar letters refer to similar parts wherever they occur on the drawings.

a represents the conductingpipe for the steam, and water in the ordinary way. From the left end, as shown in Fig. 2, is inserted a conical nozzle, b, that is secured to and made adjustable in relation to the body d of the injector by means of a set-screw, c, as shown. The end of the nozzle b is made with a T-pipe, e, as shown in Fig. 2, consisting of a lateral pipe in open communication with the annular chamber f that surrounds the nozzle b, and a central pipe leading from the aforesaid lateral pipe to the conductor a. From the chamber j' leads a i e r as shown in Fig. 2. The saidv chamber f also is in open communication with the -conductor c by means of an annular space around the end of the nozzle b that constitutes a continuation of the conductor a, as shown.

The object of this construction is that I may introduce the steam and feed water, one or the other, through either of the pipes b or g, as

forcing the steam from the pipe g into the annular space f and T-pipe c, and allowing the feed-water to enter the conical nozzle 11, a similar and -intimate contact between the steam and feed-water is effected, as in this case the steam/is forced into the conductor a partly through the annular space surrounding the end ofthe nozzle b and partly through the T- pipe c, whereas the feed-water is drawn into the said conductor c from the annular space that surrounds the central part of the aforesaid T-pipe c. Thus it will be seen that the steam and feed-water can be allowed to enter through either of the openings b or g, as may be most desirable, according to diiferent circumstances and location of the injector. Tlie conductor c terminates to the right, as seen in Fig. 2, in an additional nozzle, h, leading into an annular chamber, i', provided with three outlets-viz., 7c for the admittance of heated feed-water Z, with its valve or stop-cock m for the oyeriiow in the usual way, and n is the feed-pipe to the boiler. The object of this arrangement is to be able to feed partly with heated water, which has heretofore been difficult to accomplish. When I use the feed-pipe k for feeding heated water, I must of necessity allow some cold water to be fed with the steam either through b or g, so as to obtain a partial condensation of the steam before it comes in contact with the heated water at k. Between the openings I), g, 7.', and n, and the boiler and Water-tanks, must necessarily be used stopcocks, valves, check-valves, or their equivalents, which are not shown in the drawings, as they are Well Known and in use on all injectors and feeding apparatus of this kind.

Having thus fully described the nature, construction, and operation of my invention, I

. Wish to secure by Letters Patent, and claiml. A nozzle, b, provided at its end With a T- pipe, e, as and for the purpose set forth.

'2. In combination with the nozzle b and its lT-pipe e, of the annular chamber f and the pipe g, for the purpose as herein set forth and described.

3. In combination with thenozzle b, annular chamber f, and the pipe g, of the nozzle h, annular chamber z', feed-pipe 7c, and delivery-pipe n, in the manner and for the purpose herein set forth and shown.

In testimony that I claim the foregoing I have hereunto set my my hand this 17th day of February, 1874.

WILLIAM RANDALL.

Witnesses ALBAN ANDRN, J osIAH M. GROCKER. 

